<?php
/**
 * Zend Framework
 *
 * LICENSE
 *
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Search_Lucene
 * @subpackage Search
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Term.php 18954 2009-11-12 20:01:33Z alexander $
 */

/** Zend_Search_Lucene_Search_QueryEntry */
require_once 'Zend/Search/Lucene/Search/QueryEntry.php';

/**
 * @category   Zend
 * @package    Zend_Search_Lucene
 * @subpackage Search
 * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Search_Lucene_Search_QueryEntry_Term extends Zend_Search_Lucene_Search_QueryEntry
{
	/**
	 * Term value
	 *
	 * @var string
	 */
	private $_term;

	/**
	 * Field
	 *
	 * @var string|null
	 */
	private $_field;


	/**
	 * Fuzzy search query
	 *
	 * @var boolean
	 */
	private $_fuzzyQuery = false;

	/**
	 * Similarity
	 *
	 * @var float
	 */
	private $_similarity = 1.;


	/**
	 * Object constractor
	 *
	 * @param string $term
	 * @param string $field
	 */
	public function __construct($term, $field)
	{
		$this->_term  = $term;
		$this->_field = $field;
	}

	/**
	 * Process modifier ('~')
	 *
	 * @param mixed $parameter
	 */
	public function processFuzzyProximityModifier($parameter = null)
	{
		$this->_fuzzyQuery = true;

		if ($parameter !== null) {
			$this->_similarity = $parameter;
		} else {
			/** Zend_Search_Lucene_Search_Query_Fuzzy */
			require_once 'Zend/Search/Lucene/Search/Query/Fuzzy.php';
			$this->_similarity = Zend_Search_Lucene_Search_Query_Fuzzy::DEFAULT_MIN_SIMILARITY;
		}
	}

	/**
	 * Transform entry to a subquery
	 *
	 * @param string $encoding
	 * @return Zend_Search_Lucene_Search_Query
	 * @throws Zend_Search_Lucene_Search_QueryParserException
	 */
	public function getQuery($encoding)
	{
		if ($this->_fuzzyQuery) {
			/** Zend_Search_Lucene_Search_Query_Preprocessing_Fuzzy */
			require_once 'Zend/Search/Lucene/Search/Query/Preprocessing/Fuzzy.php';
			$query = new Zend_Search_Lucene_Search_Query_Preprocessing_Fuzzy($this->_term,
			$encoding,
			($this->_field !== null)?
			iconv($encoding, 'UTF-8', $this->_field) :
			null,
			$this->_similarity
			);
			$query->setBoost($this->_boost);
			return $query;
		}


		/** Zend_Search_Lucene_Search_Query_Preprocessing_Term */
		require_once 'Zend/Search/Lucene/Search/Query/Preprocessing/Term.php';
		$query = new Zend_Search_Lucene_Search_Query_Preprocessing_Term($this->_term,
		$encoding,
		($this->_field !== null)?
		iconv($encoding, 'UTF-8', $this->_field) :
		null
		);
		$query->setBoost($this->_boost);
		return $query;
	}
}
